40144901 has 2 divisors, whose sum is σ = 40144902. Its totient is φ = 40144900.

The previous prime is 40144883. The next prime is 40144927. The reversal of 40144901 is 10944104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 391876 = 6305^2 + 626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40144901 is a prime.

It is a super-2 number, since 2×40144901² = 3223226152599602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40144991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072450 + 20072451.

It is an arithmetic number, because the mean of its divisors is an integer number (20072451).

Almost surely, 2^40144901 is an apocalyptic number.

It is an amenable number.

40144901 is a deficient number, since it is larger than the sum of its proper divisors (1).

40144901 is an equidigital number, since it uses as much as digits as its factorization.

40144901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40144901 is about 6336.0003945707. Note that the first 3 decimals coincide. The cubic root of 40144901 is about 342.4076537224.

The spelling of 40144901 in words is "forty million, one hundred forty-four thousand, nine hundred one".